标题: Prep 2008 (2.02) 207 [打印本页] 作者: kelly1987 时间: 2011-7-16 00:25 标题: Prep 2008 (2.02) 207 Unlike...这个不是两边要平行吗？正确答案里面前面是were，后面是will。。这样也可以吗？作者: nemiah 时间: 2011-7-16 00:49
原题是？作者: kelly1987 时间: 2011-7-16 00:57
Unlike the short flights of the shuttle and earlier spacecraft, which carried sufficient power in fuel cells and batteries, a permanently orbiting space station will have to generate its own electricity. A. the short flights of the shuttle and earlier spacecraft, which carried sufficient power in fuel cells and batteries, B. the shuttle and earlier spacecraft, with sufficient enough power in fuel cells and batteries for their short flights, C. the short flights of the shuttle and earlier spacecraft, which enabled them to carry sufficient enough power in fuel cells and batteries, D. the shuttle and earlier spacecraft, which were capable of carrying sufficient power in fuel cells and batteries for their short flights, E. the flights of the shuttle and earlier spacecraft, whose shortness allowed them to carry sufficient power in fuel cells and batteries,